README
¶
DNSdist collector
DNSdist is a highly DNS-, DoS- and abuse-aware loadbalancer.
This module monitors load-balancer performance and health metrics.
It collects metrics from the internal webserver.
Used endpoints:
Requirements
For collecting metrics via HTTP, we need enabled webserver.
Metrics
All metrics have "dnsdist." prefix.
| Metric | Scope | Dimensions | Units |
|---|---|---|---|
| queries | global | all, recursive, empty | queries/s |
| queries_dropped | global | rule_drop, dynamic_blocked, no_policy, non_queries | queries/s |
| packets_dropped | global | acl | packets/s |
| answers | global | self_answered, nxdomain, refused, trunc_failures | answers/s |
| backend_responses | global | responses | responses/s |
| backend_commerrors | global | send_errors | errors/s |
| backend_errors | global | timeouts, servfail, non_compliant | responses/s |
| cache | global | hits, misses | answers/s |
| servercpu | global | system_state, user_state | ms/s |
| servermem | global | memory_usage | MiB |
| query_latency | global | 1ms, 10ms, 50ms, 100ms, 1sec, slow | queries/s |
| query_latency_avg | global | 100, 1k, 10k, 1000k | microseconds |
Configuration
Edit the go.d/dnsdist.conf configuration file using edit-config from the
Agent's config directory, which is typically at /etc/netdata.
cd /etc/netdata # Replace this path with your Netdata config directory
sudo ./edit-config go.d/dnsdist.conf
Needs url and password or apikey to access the webserver.
Here is a configuration example:
jobs:
- name: local
url: 'http://127.0.0.1:8083'
headers:
X-API-Key: 'your-api-key' # static pre-shared authentication key for access to the REST API (api-key).
- name: remote
url: 'http://203.0.113.0:8083'
headers:
X-API-Key: 'your-api-key' # static pre-shared authentication key for access to the REST API (api-key).
For all available options, see the dnsdist
collector's configuration file.
Troubleshooting
To troubleshoot issues with the dnsdist collector, run the go.d.plugin with the debug option enabled. The output
should give you clues as to why the collector isn't working.
-
Navigate to the
plugins.ddirectory, usually at/usr/libexec/netdata/plugins.d/. If that's not the case on your system, opennetdata.confand look for thepluginssetting under[directories].cd /usr/libexec/netdata/plugins.d/ -
Switch to the
netdatauser.sudo -u netdata -s -
Run the
go.d.pluginto debug the collector:./go.d.plugin -d -m dnsdist
Documentation
Source Files